The famous reality starlet tweeted out what she said was the teen pop idol's phone number, when it actually was the "Dancing With the Stars" voting line for the younger Kardashian.

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"OMG I have @JustinBieber 's phone #!!!! 800 8683402! CALL HIM! He's taking calls for the next hour!!!" Kardashian wrote to her more than 10 million followers.

Soon afterward Kim Kardashian admitted to the maneuver, tweeting "Ok guys obviously I'm joking, that's not Justin's #! But seriously call & vote for @RobKardashian& @CherylBurke 8000 8683402!!! Xoxoxo." She had also been tweeting the number all night, identifying it as her brother's "Dancing With the Stars" line.

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But that didn't stop the fake Bieber number from being retweeted more than 100 times, including by mom Kris Jenner to her 1.4 million followers, The Washington Post notes.

The following night, Rob scored high enough to stay on the show while Chaz Bono was sent packing home.

Family and friends of the popular ABC dancing show's contestants have launched their own supportive campaigns, including a string of defensive tweets from Bono's legendary diva mom Cher.